Sans-culottism n. : Extreme republican principles; the principles or practice of the sans-culottes.

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Taxonomy
Sans-culottes, free encyclopedia, revolutionary, the French, poorer, History, the Reign of Terror, governments, Revolutionary army, the French Revolutionary Wars, search, rendition, sans-culotte, dominant theory, fashionable, knee-length, equipped, volunteers.

Defination from the web:
Sans-culottes (French for without knee-breeches) was a term created 1790 - 1792 by the French to describe the poorer members of the Third Estate, ... Led by revolutionaries such as Jacques Hébert, the sans-culottes played a crucial role in such events as the September massacres of 1792, and ...